2025 Volume 90 Issue 833 Pages 790-801
We investigated reduction effects of effective input motions on actual buildings by analyzing strong-motion records obtained from 17 buildings with various ground conditions. Based on the records observed at the base and nearby ground surface of those buildings, the peak amplitude ratio of the base to the ground surface was evaluated. Furthermore, numerical analyses using axisymmetric hyperelements were conducted to identify foundation and soil parameters influencing the reduction effects of effective input motions to structures. It was found that the peak amplitude ratio of the base to the ground surface is highly dependent on the shear wave propagation time.
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